Transmission-gearing.



J. DEMMLBR.

TRANSMISSION GEARINLn APPLICATION rum), MAY 15.

Patented Oct 8, 1912.

A TTORNEY JOHN DEMMLER, or onovn CITY, JenNnsYLvANIA.

TnANsraIssroN-enanmo.

Specification of Letters Patent.

Application filed. May 15, 1912. Serial No. 697,382.

,. subject of the Emperor of Germany, resid- I lng at Grove City, in thecounty of Mercer be employed to nects to the main shaft 5.

and State of Pennsylvania, have invented a new and. ImprovedTransmission-Gearing,

of which the following'is a specification.

Thi'slinvention relates to means for driv ing' vehicles, and its objectis to {provide a power-transmitting, device between the engme shaft andthe main-intermediate or jack-shaft which shall be simple, compact andeificient."

In the accompanying drawing, Figure 1 is a (plan of the drivingmechanism. Figs.

22m 3 are details of reversing gears.

Similar reference characters refer to like parts-- throughout theseveral views.

Theconstruction shown in the drawings is especially ad'a ted fortractors, but may di'ive any other type'of vehicle. Any desired type ofengine may be employed, that shown being a well-known form. consistingof a body or case 1, cylinders 2, fiy-wheel-S, and clutch 4 which con-This portion of the mechanism is merely shown to illustrate the generalapplicationlof my invention.

The chassis is merely indicated as formed of side-bars 7 and end bars 8.

' The jack shaft or main-intermediate shaft of the transmissionmechanism is formed of two parts 9 and 10 in the usual manner, whicharts are connected by any desired form of differential gearing 11,indicated in dotted lines within the well known casing 12.

On the main shaft is.slidably mounted a sleeve 6 which is caused torevolve with this shaft in any desired manner. I prefer to square theshaft intermediate its ends, as at 13 inFigs. 2 and 3, The sleeve hascollars 14 between which a fork 15 extends. This fork may be operated inany desired manner to shift theisleeve either way along th shaft. On thesleeve is formed a spunpin ion 16, and the ends of the r'cr-ve e p videdwith jaws 17 which may engage w th the supplementary jaws on thetransmission members 18 and which are freely revoluble on the shaft.These transmission members 18 and 19 as well as the members 20 and 21that are connected to' the casing 12, may be of any desired type, spurgears preferred. The pinion 19 is smaller than the hicle is to bedriven. Sliding the sleeve (3 so its Jaws 1?" engage with the jawsformed on the gear 19 will cause the engine to drive the differentialcasing 12 at one speed, and at a dlil'ercht and greater speed when theaws on the sleeve engage those on the gear hen the sleeve is central, asshown in lfig. 1., the shaft 9-10 will normally be stat-lonary.

In order to drive the shaft 9-10 in the reverse direction, means shownin Figs. 9 and 3 are employed to transmit movement from the gear 16 tothe pinion 21. A long gear 22 is mounted on the shaft Qilnnd is iii meshwith the gear 21, and is slidably mounted so it can be moved into meshwith the gear 16. Collars 24 may he formed on the hub of this gear 22 sothat it may he moved by any proper mechanism. The shaft 23 is carried bythe auxiliary frame 25 which is mounted on the jacleshaft 9-10 and onthe supports 26 and 527. ,This frame 25 supports the hearings for theshaft 5.

From the jack-shaft, power may he trnnsmitted in any desired manner. Inthe drawing, sprocket wheels 29 and chains 30 are shown, which chainsrun on the large wheel driving chain-gears 31 on the rear axle 3?.

By this construction, the usual hovel gears now employed between theengine and jack shaft are eliminated, as well as the countcrshaft andhearings therefor. The fricl ion of these parts is therefore done awaywith, and the eiliciency of the mitotis increased.

The construction is very comm-act and of few parts, the distance betweenthe main shaft 5 and the jurleshaft being reduced to a minimum and, asthe majority of starting operations are forward, the great wear on gearteeth now occurring n many of the present sliding transmissions isavoided.

The proportions and sizes of the parts may be varied according tocircumstances by those skilled intho art.

l-laving now explained my construction, ill? I claim as my invention anddesire to secure by Letters Patent is 1. In a transmission gearing, thecombination of a main shaft, means to drive the same, a sleeve slidablethereon and revoluhle therewith, said sleeve formed with clutch memberat each end and a spur gear, a pinion loosely mounted on said shaft ateach end of the sleeve, driven gears meshing with said pinions, a smallgear in mesh with one of the driven gears, and means to cause the smallgear to move into and out of mesh with the gear on the sleeve.

2. In a transmission gearing, the combination of a shaft, means to drivethe same, a

sleeve slidable thereon and revoluble. therewith and provided with aclutch member at one end, a pinion revoluble on said shaft and having aclutch member adapted to be en- 'gaged by the clutch on the sleeve, adriven gear meshing with said pinion, a pinion formed on said sleeve, 21small gear meshmg with the drlven gear and means to move the same intoengagement with the pinion on the sleeve.

3. In a transmission gearing, the combination of a mam shaft and meansto drive the same, a sleeve shdable thereon and revoluble therewith,said sleeve formed wlth a clutch member at each end and a spur gear,

pinions'of different sizes loosely mounted on said shaft, one'at eachend of the sleeve, and provided with clutch members adapted to beengaged by the clutch member on the adj acent end of the-sleeve, drivengears meshing specification in the presence of two subscribingwitnesses.

JOHN DEMMLER.

Witnesses:

J OHN MCCUNE, J12, EDWIN F. ATWELL.

